What type of sentence is this?

Before the game ended, Jason scored three touchdowns.

Simple

Compound

Complex

Compound-complex

This sentence is a complex sentence, as it consists of an individual clause (Jason scored three touchdowns) and a dependent clause (Before the game ended). The other answer cannot be correct, as a simple sentence contains only one independent sentence, compound contains two independent sentences, and compound-complex contains two or more independent clauses, and at least one dependent clause.